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Electricity and Magnetism
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What is the magnet in shape of a rectangular bar called?
bar magnet
The .......... is attracted to the electromagnet and hits the bell
hammer
The study of how electricity and magnetism are related and how the interact with each other is called
electromagnetism
The red end of the needle of a compass will always point
north
What is an example of a magnetic material that attracts magnets?
iron
Name two common electromagnetic inventions
high speed trains, electric bells, speakers and microphones
What train uses magnets to levitate and move forward?
maglev
Many modern inventions use
electromagnets
A magnet that moves can produce electricity with a
turbine
The first electric motor is also called a
dynamo
Who called his invention an electrodynamic rotary device?
Faraday
Who noticed that an electric current affects a compass needle?
Oersted
Who discovered the electrodynamic molecule now called the electron?
Ampere
Who discovered that electricity and magnetism are related?
Oersted
The magnetic north pole of the Earth is actually the. .... of the magnetosphere
South pole
The north pole of the needle is ..... to the magnetic north pole of the Earth
attracted
The centre of the Earth is made of
liquid iron
The magnetosphere extends from the
north pole to the south pole
The magnetosphere protects life on Earth by ............ solar radiation.
deflecting
Earth's magnetic field protects us from
solar radiation
We can identify a magnetic by testing if is ......
is repelled by another magnet
The magnetic field is ........ near the poles
stronger
Iron fillings can be used to show ........... of the magnetic field
the location and direction
The north pole is .... charged
positively
Permanent magnets have
two poles
What is this diagram called?
a magnetic field
Which magnets can't be switched on or off?
Bar/Permanent magnets
What can attract magnetic objects through other substances?
magnets
What charges don't repel each other?
a positive and a negative charge
What determines if a substance is magnetic or not?
The direction of an orbit
What is an invisible force between two magnetic objects?
Magnetism
This is an example of an
electric circuit
In order to produce electricity, a force is needed to make an electron
leave its orbit
The constant movement of electrons between atoms is called
electric current
Neutrons have a
neutral charge
Protons have a
positive charge
Electrons have a
negative charge
Particles with the same electric charge
repel each other
When an electron leaves its orbit, the atom becomes
positively charged
A nucleus has
neutrons and protons
In a stable atom there are the same number of
protons and electrons
All matter is made up of ....
atoms


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